Tsuga mertensiana
![](/Images/godic/202502/18/Tsuga_mertensiana_02614434.JPG")
![](/Images/godic/202502/18/Tsuga_mertensiana_range_map_14434.png")
![Foliage and cones of subsp. mertensiana](/Images/godic/202502/18/MountainHemlock_67394434.jpg")
![Foliage of subsp. grandicona](/Images/godic/202502/18/Tsuga_mertensiana24434.jpg")
Tsuga mertensiana, known as mountain hemlock, is a species of hemlock native to the west coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in northern Tulare County, California. Mertensiana refers to Franz Carl Mertens (1764–1831), a German botanist.